CN216568570U

CN216568570U - Anti-impact micro-foaming weight-reduction safety helmet

Info

Publication number: CN216568570U
Application number: CN202122027519.7U
Authority: CN
Inventors: 高苏闽; 张靖
Original assignee: Andanda Industrial Technology Shanghai Co ltd
Current assignee: Andanda Industrial Technology Shanghai Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-05-24
Anticipated expiration: 2031-08-26

Abstract

The utility model provides an impact-resistant micro-foaming weight-reducing safety helmet which comprises a helmet shell, wherein the helmet shell is provided with an outer shell and a core part, the core is coated inside the outer shell, the core part is provided with a plurality of closed micropores in dispersion distribution, and the pore size of the closed micropores is not more than 100 mu m. The core part is of an integrated structure prepared by adopting a micro-foaming injection molding process. The impact-resistant micro-foamed weight-reduction safety helmet has better impact resistance and shock absorption performance and lighter weight.

Description

Anti-impact micro-foaming weight-reduction safety helmet

Technical Field

The utility model relates to the technical field of safety protection, in particular to an impact-resistant micro-foaming weight-reducing safety helmet.

Background

The existing safety helmet in the market is generally made by a common injection molding process and adopting the traditional materials without special additives such as PE, ABS, PC/ABS, glass fiber and the like. The traditional glass fiber reinforced plastic safety helmet has larger mass of the injection molded helmet due to the higher density of the glass fiber, and people feel uncomfortable after wearing the helmet for a long time. Wherein, the safety helmet made of common PE or ABS has better appearance due to the single nature of the raw materials. Compared with the traditional safety helmets such as ABS and the like, the glass fiber reinforced plastic safety helmet has good rigidity and poor toughness, and the glass fiber reinforced plastic safety helmet has more excellent performance by reducing weight and improving shock resistance.

The micro-foaming technology is characterized in that closed micropores with the theoretical size of dozens to dozens of micrometers are distributed in the middle of a product through an injection molding process under the action of gas internal pressure, and compact skin structures are arranged on two sides of the product, so that the effects of saving materials and reducing weight are achieved. Therefore, light impact-resistant safety helmet can be obtained by applying the micro-foaming technology to the manufacture of the safety helmet.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention is directed to providing an impact-resistant micro-foamed weight-reduction helmet, which is integrated into the production of a glass fiber reinforced plastic helmet through a micro-foamed weight-reduction technology, and forms a micro-foamed structure in a helmet shell by mixing a foaming agent during closed-mold injection molding, so that the overall weight of the helmet is reduced, and the impact resistance of the helmet is improved. The purpose of the utility model is realized by the following technical scheme:

the utility model provides an impact-resistant micro-foaming weight-reducing safety helmet which comprises a helmet shell, wherein the helmet shell is provided with an outer shell and a core part, the core is coated inside the outer shell, the core part is provided with a plurality of closed micropores which are distributed in a dispersed mode, and the pore size of each closed micropore is not more than 100 mu m.

Further, the core part is an integrated structure prepared by adopting a micro-foaming injection molding process.

Furthermore, the core part is an integrally formed structure which is prepared by adopting a glass fiber reinforced plastic material through a closed-mold injection molding micro-foaming injection molding process.

Furthermore, the glass fiber content of the core part accounts for 30-50% of the total mass of the core part.

Further, the glass fiber content of the core portion accounts for 40% of the total mass of the core portion.

Further, the outer shell is made of glass fiber reinforced plastic materials.

Further, the outer surface of the outer shell is provided with a paint spraying coating.

The utility model has the beneficial effects that:

(1) according to the GB2811 impact resistance test standard, compared with a common glass fiber reinforced plastic safety helmet prepared from the same glass fiber reinforced plastic components and material weight, the impact residual stress of the impact-resistant micro-foamed weight-reduction safety helmet can be reduced to below 1500N from 2500-3500N at high temperature, and the impact resistance and the shock absorption performance are better;

(2) repeated experiments prove that when the anti-impact micro-foaming weight-reducing safety helmet has the same anti-impact performance, the anti-impact micro-foaming weight-reducing safety helmet can reduce the weight by 8-12% compared with the common glass fiber reinforced plastic safety helmet.

Drawings

FIG. 1 is a schematic view of the structure of the safety helmet of the present invention;

FIG. 2 is a schematic scanning electron microscope showing a core according to the present invention.

In the figure:

1-spray painting coating; 2-an outer shell; 3-a core; 31-closed microwell.

Detailed Description

The technical solution of the preferred embodiment of the impact-resistant micro-foamed weight-reducing helmet of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the following description, the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiment provides an impact-resistant micro-foaming weight-reducing safety helmet, which comprises a helmet shell, as shown in fig. 1, having an outer shell 2 and a core 3, wherein the core 3 is coated inside the outer shell 2, and the core 3 has a plurality of closed micropores 31 distributed in a dispersed manner, as shown in fig. 2, wherein the pore size of each micropore 31 is not more than 100 μm, and in a preferred embodiment, the size of each micropore 31 is substantially equal and is between 10 μm and 50 μm.

In a preferred embodiment, the core part 3 is an integrated structure prepared by adopting a micro-foaming injection molding process of glass fiber reinforced plastic material through closed-mold injection molding, and specifically, the material is obtained by adding a foaming agent into glass fiber master batches, uniformly stirring, adding into a cavity of an injection molding machine with a resin material melted therein, and performing closed-mold foaming.

In a preferred embodiment, the material of the core 3 has a glass fibre content of between 30% and 50%, most preferably 40%, by weight of the total mass of the core, and about 0.3% by weight of a foaming agent is added when the core is made.

In a preferred embodiment, the outer shell is made of glass fiber reinforced plastic material; in order to ensure the appearance quality, the outer surface of the outer shell 2 is provided with a spray painting coating 1.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, while the utility model has been described in detail with reference to the foregoing preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the utility model as defined by the appended claims; the sizes in the drawings and the embodiments are not related to specific objects, and are not used for limiting the protection scope of the utility model, and the sizes of the objects can be selected and changed according to actual needs.

Claims

1. An impact-resistant micro-foamed weight-reduction helmet comprising a helmet shell, characterized in that the helmet shell has an outer shell (2) and a core (3), the core (3) is coated inside the outer shell (2), the core (3) has a plurality of closed micropores (31) distributed in a dispersed manner, and the pore size of the closed micropores (31) is not more than 100 μm.

2. An impact-resistant micro-foamed weight-reduction helmet according to claim 1, characterized in that the core (3) is a one-piece structure manufactured by a micro-foamed injection molding process.

3. An impact-resistant micro-foamed weight-reduction helmet according to claim 1 or 2, characterized in that the outer shell (2) is made of glass fiber reinforced plastic material.

4. An impact-resistant microfoamed weight-reducing helmet according to claim 3, wherein the outer shell has a lacquer coating (1) on its outer surface.